// 包含多个基于state计算属性的对象
export default {
    totalCount (state) {
        return state.cartFoods.reduce((preTotal,food)=>preTotal + food.count,0)
    },
    totalPrice(state) {
        return state.cartFoods.reduce((preTotal,food)=>preTotal + food.count*food.price,0)
    },
    positiveSize (state) {
        return state.ratings.reduce((preTotal,rating)=>preTotal + (rating.rateType===0?1:0),0)
    }
}